## -*- mode: perl; -*-
## Standard openssl configuration targets.

# Helper functions for the Windows configs
my $vc_win64a_info = {};
sub vc_win64a_info {
    unless (%$vc_win64a_info) {
        if (`nasm -v 2>NUL` =~ /NASM version ([0-9]+\.[0-9]+)/ && $1 >= 2.0) {
            $vc_win64a_info = { as        => "nasm",
                                asflags   => "-f win64 -DNEAR -Ox -g",
                                asoutflag => "-o" };
        } elsif ($disabled{asm}) {
            $vc_win64a_info = { as        => "ml64",
                                asflags   => "/c /Cp /Cx /Zi",
                                asoutflag => "/Fo" };
        } else {
            $die->("NASM not found - please read INSTALL and NOTES.WIN for further details\n");
            $vc_win64a_info = { as        => "{unknown}",
                                asflags   => "",
                                asoutflag => "" };
        }
    }
    return $vc_win64a_info;
}

my $vc_win32_info = {};
sub vc_win32_info {
    unless (%$vc_win32_info) {
        my $ver=`nasm -v 2>NUL`;
        my $vew=`nasmw -v 2>NUL`;
        if ($ver ne "" || $vew ne "") {
            $vc_win32_info = { as        => $ver ge $vew ? "nasm" : "nasmw",
                               asflags   => "-f win32",
                               asoutflag => "-o",
                               perlasm_scheme => "win32n" };
        } elsif ($disabled{asm}) {
            $vc_win32_info = { as        => "ml",
                               asflags   => "/nologo /Cp /coff /c /Cx /Zi",
                               asoutflag => "/Fo",
                               perlasm_scheme => "win32" };
        } else {
            $die->("NASM not found - please read INSTALL and NOTES.WIN for further details\n");
            $vc_win32_info = { as        => "{unknown}",
                               asflags   => "",
                               asoutflag => "",
                               perlasm_scheme => "win32" };
        }
    }
    return $vc_win32_info;
}

my $vc_wince_info = {};
sub vc_wince_info {
    unless (%$vc_wince_info) {
        # sanity check
        $die->('%OSVERSION% is not defined') if (!defined($ENV{'OSVERSION'}));
        $die->('%PLATFORM% is not defined')  if (!defined($ENV{'PLATFORM'}));
        $die->('%TARGETCPU% is not defined') if (!defined($ENV{'TARGETCPU'}));

        #
        # Idea behind this is to mimic flags set by eVC++ IDE...
        #
        my $wcevers = $ENV{'OSVERSION'};                    # WCENNN
	my $wcevernum;
	my $wceverdotnum;
	if ($wcevers =~ /^WCE([1-9])([0-9]{2})$/) {
	    $wcevernum = "$1$2";
	    $wceverdotnum = "$1.$2";
	} else {
	    $die->('%OSVERSION% value is insane');
	    $wcevernum = "{unknown}";
	    $wceverdotnum = "{unknown}";
	}
        my $wcecdefs = "-D_WIN32_WCE=$wcevernum -DUNDER_CE=$wcevernum"; # -D_WIN32_WCE=NNN
        my $wcelflag = "/subsystem:windowsce,$wceverdotnum";        # ...,N.NN

        my $wceplatf =  $ENV{'PLATFORM'};

        $wceplatf =~ tr/a-z0-9 /A-Z0-9_/;
        $wcecdefs .= " -DWCE_PLATFORM_$wceplatf";

        my $wcetgt = $ENV{'TARGETCPU'};                     # just shorter name...
      SWITCH: for($wcetgt) {
          /^X86/        && do { $wcecdefs.=" -Dx86 -D_X86_ -D_i386_ -Di_386_";
                                $wcelflag.=" /machine:X86";     last; };
          /^ARMV4[IT]/  && do { $wcecdefs.=" -DARM -D_ARM_ -D$wcetgt";
                                $wcecdefs.=" -DTHUMB -D_THUMB_" if($wcetgt=~/T$/);
                                $wcecdefs.=" -QRarch4T -QRinterwork-return";
                                $wcelflag.=" /machine:THUMB";   last; };
          /^ARM/        && do { $wcecdefs.=" -DARM -D_ARM_ -D$wcetgt";
                                $wcelflag.=" /machine:ARM";     last; };
          /^MIPSIV/     && do { $wcecdefs.=" -DMIPS -D_MIPS_ -DR4000 -D$wcetgt";
                                $wcecdefs.=" -D_MIPS64 -QMmips4 -QMn32";
                                $wcelflag.=" /machine:MIPSFPU"; last; };
          /^MIPS16/     && do { $wcecdefs.=" -DMIPS -D_MIPS_ -DR4000 -D$wcetgt";
                                $wcecdefs.=" -DMIPSII -QMmips16";
                                $wcelflag.=" /machine:MIPS16";  last; };
          /^MIPSII/     && do { $wcecdefs.=" -DMIPS -D_MIPS_ -DR4000 -D$wcetgt";
                                $wcecdefs.=" -QMmips2";
                                $wcelflag.=" /machine:MIPS";    last; };
          /^R4[0-9]{3}/ && do { $wcecdefs.=" -DMIPS -D_MIPS_ -DR4000";
                                $wcelflag.=" /machine:MIPS";    last; };
          /^SH[0-9]/    && do { $wcecdefs.=" -D$wcetgt -D_${wcetgt}_ -DSHx";
                                $wcecdefs.=" -Qsh4" if ($wcetgt =~ /^SH4/);
                                $wcelflag.=" /machine:$wcetgt"; last; };
          { $wcecdefs.=" -D$wcetgt -D_${wcetgt}_";
            $wcelflag.=" /machine:$wcetgt";                     last; };
      }

        $vc_wince_info = { cflags => $wcecdefs,
                           lflags => $wcelflag };
    }
    return $vc_wince_info;
}

# Helper functions for the VMS configs
my $vms_info = {};
sub vms_info {
    unless (%$vms_info) {
        my $pointer_size = shift;
        my $pointer_size_str = $pointer_size == 0 ? "" : "$pointer_size";

        $vms_info->{disable_warns} = [ ];
        $vms_info->{pointer_size} = $pointer_size_str;
        if ($pointer_size == 64) {
            `PIPE CC /NOCROSS_REFERENCE /NOLIST /NOOBJECT /WARNINGS = DISABLE = ( MAYLOSEDATA3, EMPTYFILE ) NL: 2> NL:`;
            if ($? == 0) {
                push @{$vms_info->{disable_warns}}, "MAYLOSEDATA3";
            }
        }

        unless ($disabled{zlib}) {
            my $default_zlib = 'GNV$LIBZSHR' . $pointer_size_str;
            if (defined($disabled{"zlib-dynamic"})) {
                $vms_info->{zlib} = $withargs{zlib_lib} || "$default_zlib/SHARE";
            } else {
                $vms_info->{def_zlib} = $withargs{zlib_lib} || $default_zlib;
                # In case the --with-zlib-lib value contains something like
                # /SHARE or /LIB or so at the end, remove it.
                $vms_info->{def_zlib} =~ s|/.*$||g;
            }
        }
    }
    return $vms_info;
}

%targets = (

#### Basic configs that should work on any 32-bit box
    "gcc" => {
        cc               => "gcc",
        cflags           => picker(debug   => "-O0 -g",
                                   release => "-O3"),
        thread_scheme    => "(unknown)",
        bn_ops           => "BN_LLONG",
    },
    "cc" => {
        cc               => "cc",
        cflags           => "-O",
        thread_scheme    => "(unknown)",
    },

#### VOS Configurations
    "vos-gcc" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "gcc",
        cflags           => picker(default => "-Wall -DOPENSSL_SYS_VOS -D_POSIX_C_SOURCE=200112L -D_BSD -D_VOS_EXTENDED_NAMES -DB_ENDIAN",
                                   debug   => "-O0 -g",
                                   release => "-O3"),
        thread_scheme    => "(unknown)",
        sys_id           => "VOS",
        lflags           => "-Wl,-map",
        bn_ops           => "BN_LLONG",
        shared_extension => ".so",
    },

#### Solaris configurations
    "solaris-common" => {
        inherit_from     => [ "BASE_unix" ],
        template         => 1,
        cflags           => "-DFILIO_H",
        ex_libs          => add("-lsocket -lnsl -ldl"),
        dso_scheme       => "dlfcn",
        thread_scheme    => "pthreads",
        shared_target    => "solaris-shared",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
    },
#### Solaris x86 with GNU C setups
    "solaris-x86-gcc" => {
        # NB. GNU C has to be configured to use GNU assembler, and not
        # /usr/ccs/bin/as. Failure to comply will result in compile
        # failures [at least] in 32-bit build.
        # [Above statement is in direct contradition with one below.
        #  Latter is kept, because it's formally inappropriate to
        #  modify compile flags in letter release.]
        # -DOPENSSL_NO_INLINE_ASM switches off inline assembler. We have
        # to do it here because whenever GNU C instantiates an assembler
        # template it surrounds it with #APP #NO_APP comment pair which
        # (at least Solaris 7_x86) /usr/ccs/bin/as fails to assemble
        # with "Illegal mnemonic" error message.
        inherit_from     => [ "solaris-common", asm("x86_elf_asm") ],
        cc               => "gcc",
        cflags           => add_before(picker(default => "-Wall -DL_ENDIAN -DOPENSSL_NO_INLINE_ASM",
                                              debug   => "-O0 -g",
                                              release => "-O3 -fomit-frame-pointer"),
                                       threads("-pthread")),
        ex_libs          => add(threads("-pthread")),
        bn_ops           => "BN_LLONG",
        shared_cflag     => "-fPIC",
        shared_ldflag    => "-shared -static-libgcc",
    },
    "solaris64-x86_64-gcc" => {
        # -shared -static-libgcc might appear controversial, but modules
        # taken from static libgcc do not have relocations and linking
        # them into our shared objects doesn't have any negative side
        # effects. On the contrary, doing so makes it possible to use
        # gcc shared build with Sun C. Given that gcc generates faster
        # code [thanks to inline assembler], I would actually recommend
        # to consider using gcc shared build even with vendor compiler:-)
        #					<appro@fy.chalmers.se>
        inherit_from     => [ "solaris-common", asm("x86_64_asm") ],
        cc               => "gcc",
        cflags           => add_before(picker(default => "-m64 -Wall -DL_ENDIAN",
                                              debug   => "-O0 -g",
                                              release => "-O3"),
                                       threads("-pthread")),
        ex_libs          => add(threads("-pthread")),
        bn_ops           => "SIXTY_FOUR_BIT_LONG",
        perlasm_scheme   => "elf",
        shared_cflag     => "-fPIC",
        shared_ldflag    => "-m64 -shared -static-libgcc",
        multilib         => "/64",
    },

#### Solaris x86 with Sun C setups
    # There used to be solaris-x86-cc target, but it was removed,
    # primarily because vendor assembler can't assemble our modules
    # with -KPIC flag. As result it, assembly support, was not even
    # available as option. But its lack means lack of side-channel
    # resistant code, which is incompatible with security by todays
    # standards. Fortunately gcc is readily available prepackaged
    # option, which we can firmly point at...
    #
    # On related note, solaris64-x86_64-cc target won't compile code
    # paths utilizing AVX and post-Haswell instruction extensions.
    # Consider switching to solaris64-x86_64-gcc even here...
    #
    "solaris64-x86_64-cc" => {
        inherit_from     => [ "solaris-common", asm("x86_64_asm") ],
        cc               => "cc",
        cflags           => add_before(picker(default => "-xarch=generic64 -xstrconst -Xa -DL_ENDIAN",
                                              debug   => "-g",
                                              release => "-xO5 -xdepend -xbuiltin"),
                                       threads("-D_REENTRANT")),
        thread_scheme    => "pthreads",
        lflags           => add("-xarch=generic64",threads("-mt")),
        ex_libs          => add(threads("-lpthread")),
        bn_ops           => "SIXTY_FOUR_BIT_LONG",
        perlasm_scheme   => "elf",
        shared_cflag     => "-KPIC",
        shared_ldflag    => "-xarch=generic64 -G -dy -z text",
        multilib         => "/64",
    },

#### SPARC Solaris with GNU C setups
    "solaris-sparcv7-gcc" => {
        inherit_from     => [ "solaris-common" ],
        cc               => "gcc",
        cflags           => add_before(picker(default => "-Wall -DB_ENDIAN -DBN_DIV2W",
                                              debug   => "-O0 -g",
                                              release => "-O3"),
                                       threads("-pthread")),
        ex_libs          => add(threads("-pthread")),
        bn_ops           => "BN_LLONG RC4_CHAR",
        shared_cflag     => "-fPIC",
        shared_ldflag    => "-shared",
    },
    "solaris-sparcv8-gcc" => {
        inherit_from     => [ "solaris-sparcv7-gcc", asm("sparcv8_asm") ],
        cflags           => add_before("-mcpu=v8"),
    },
    "solaris-sparcv9-gcc" => {
        # -m32 should be safe to add as long as driver recognizes
        # -mcpu=ultrasparc
        inherit_from     => [ "solaris-sparcv7-gcc", asm("sparcv9_asm") ],
        cflags           => add_before("-m32 -mcpu=ultrasparc"),
    },
    "solaris64-sparcv9-gcc" => {
        inherit_from     => [ "solaris-sparcv9-gcc" ],
        cflags           => sub { my $f=join(" ",@_); $f =~ s/\-m32/-m64/; $f; },
        bn_ops           => "BN_LLONG RC4_CHAR",
        shared_ldflag    => "-m64 -shared",
        multilib         => "/64",
    },

#### SPARC Solaris with Sun C setups
# SC4.0 doesn't pass 'make test', upgrade to SC5.0 or SC4.2.
# SC4.2 is ok, better than gcc even on bn as long as you tell it -xarch=v8
# SC5.0 note: Compiler common patch 107357-01 or later is required!
    "solaris-sparcv7-cc" => {
        inherit_from     => [ "solaris-common" ],
        cc               => "cc",
        cflags           => add_before(picker(default => "-xstrconst -Xa -DB_ENDIAN -DBN_DIV2W",
                                              debug   => "-g",
                                              release => "-xO5 -xdepend"),
                                       threads("-D_REENTRANT")),
        lflags           => add(threads("-mt")),
        ex_libs          => add(threads("-lpthread")),
        bn_ops           => "BN_LLONG RC4_CHAR",
        shared_cflag     => "-KPIC",
        shared_ldflag    => "-G -dy -z text",
    },
####
    "solaris-sparcv8-cc" => {
        inherit_from     => [ "solaris-sparcv7-cc", asm("sparcv8_asm") ],
        cflags           => add_before("-xarch=v8"),
    },
    "solaris-sparcv9-cc" => {
        inherit_from     => [ "solaris-sparcv7-cc", asm("sparcv9_asm") ],
        cflags           => add_before("-xarch=v8plus"),
    },
    "solaris64-sparcv9-cc" => {
        inherit_from     => [ "solaris-sparcv7-cc", asm("sparcv9_asm") ],
        cflags           => add_before("-xarch=v9"),
        lflags           => add_before("-xarch=v9"),
        bn_ops           => "BN_LLONG RC4_CHAR",
        shared_ldflag    => "-xarch=v9 -G -dy -z text",
        multilib         => "/64",
    },

#### IRIX 6.x configs
# Only N32 and N64 ABIs are supported.
    "irix-mips3-gcc" => {
        inherit_from     => [ "BASE_unix", asm("mips64_asm") ],
        cc               => "gcc",
        cflags           => combine(picker(default => "-mabi=n32 -DB_ENDIAN -DBN_DIV3W",
                                           debug   => "-g -O0",
                                           release => "-O3"),
                                    threads("-D_SGI_MP_SOURCE")),
        ex_libs          => add(threads("-lpthread")),
        bn_ops           => "RC4_CHAR SIXTY_FOUR_BIT",
        thread_scheme    => "pthreads",
        perlasm_scheme   => "n32",
        dso_scheme       => "dlfcn",
        shared_target    => "irix-shared",
        shared_ldflag    => "-mabi=n32",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
        multilib         => "32",
    },
    "irix-mips3-cc" => {
        inherit_from     => [ "BASE_unix", asm("mips64_asm") ],
        cc               => "cc",
        cflags           => combine(picker(default => "-n32 -mips3 -use_readonly_const -G0 -rdata_shared -DB_ENDIAN -DBN_DIV3W",
                                           debug   => "-g -O0",
                                           release => "-O2"),
                                    threads("-D_SGI_MP_SOURCE")),
        ex_libs          => add(threads("-lpthread")),
        bn_ops           => "RC4_CHAR SIXTY_FOUR_BIT",
        thread_scheme    => "pthreads",
        perlasm_scheme   => "n32",
        dso_scheme       => "dlfcn",
        shared_target    => "irix-shared",
        shared_ldflag    => "-n32",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
        multilib         => "32",
    },
    # N64 ABI builds.
    "irix64-mips4-gcc" => {
        inherit_from     => [ "BASE_unix", asm("mips64_asm") ],
        cc               => "gcc",
        cflags           => combine(picker(default => "-mabi=64 -mips4 -DB_ENDIAN -DBN_DIV3W",
                                           debug   => "-g -O0",
                                           release => "-O3"),
                                    threads("-D_SGI_MP_SOURCE")),
        ex_libs          => add(threads("-lpthread")),
        bn_ops           => "RC4_CHAR SIXTY_FOUR_BIT_LONG",
        thread_scheme    => "pthreads",
        perlasm_scheme   => "64",
        dso_scheme       => "dlfcn",
        shared_target    => "irix-shared",
        shared_ldflag    => "-mabi=64",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
        multilib         => "64",
    },
    "irix64-mips4-cc" => {
        inherit_from     => [ "BASE_unix", asm("mips64_asm") ],
        cc               => "cc",
        cflags           => combine(picker(default => "-64 -mips4 -use_readonly_const -G0 -rdata_shared -DB_ENDIAN -DBN_DIV3W",
                                           debug   => "-g -O0",
                                           release => "-O2"),
                                    threads("-D_SGI_MP_SOURCE")),
        ex_libs          => add(threads("-lpthread")),
        bn_ops           => "RC4_CHAR SIXTY_FOUR_BIT_LONG",
        thread_scheme    => "pthreads",
        perlasm_scheme   => "64",
        dso_scheme       => "dlfcn",
        shared_target    => "irix-shared",
        shared_ldflag    => "-64",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
        multilib         => "64",
    },

#### Unified HP-UX ANSI C configs.
# Special notes:
# - Originally we were optimizing at +O4 level. It should be noted
#   that the only difference between +O3 and +O4 is global inter-
#   procedural analysis. As it has to be performed during the link
#   stage the compiler leaves behind certain pseudo-code in lib*.a
#   which might be release or even patch level specific. Generating
#   the machine code for and analyzing the *whole* program appears
#   to be *extremely* memory demanding while the performance gain is
#   actually questionable. The situation is intensified by the default
#   HP-UX data set size limit (infamous 'maxdsiz' tunable) of 64MB
#   which is way too low for +O4. In other words, doesn't +O3 make
#   more sense?
# - Keep in mind that the HP compiler by default generates code
#   suitable for execution on the host you're currently compiling at.
#   If the toolkit is meant to be used on various PA-RISC processors
#   consider './Configure hpux-parisc-[g]cc +DAportable'.
# - -DMD32_XARRAY triggers workaround for compiler bug we ran into in
#   32-bit message digests. (For the moment of this writing) HP C
#   doesn't seem to "digest" too many local variables (they make "him"
#   chew forever:-). For more details look-up MD32_XARRAY comment in
#   crypto/sha/sha_lcl.h.
# - originally there were 32-bit hpux-parisc2-* targets. They were
#   scrapped, because a) they were not interchangeable with other 32-bit
#   targets; b) performance-critical 32-bit assembly modules implement
#   even PA-RISC 2.0-specific code paths, which are chosen at run-time,
#   thus adequate performance is provided even with PA-RISC 1.1 build.
#					<appro@fy.chalmers.se>
    "hpux-parisc-gcc" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "gcc",
        cflags           => combine(picker(default => "-DB_ENDIAN -DBN_DIV2W",
                                           debug   => "-O0 -g",
                                           release => "-O3"),
                                    threads("-pthread")),
        ex_libs          => add("-Wl,+s -ldld", threads("-pthread")),
        bn_ops           => "BN_LLONG",
        thread_scheme    => "pthreads",
        dso_scheme       => "dl",
        shared_target    => "hpux-shared",
        shared_cflag     => "-fPIC",
        shared_ldflag    => "-shared",
        shared_extension => ".sl.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
    },
    "hpux-parisc1_1-gcc" => {
        inherit_from     => [ "hpux-parisc-gcc", asm("parisc11_asm") ],
        multilib         => "/pa1.1",
    },
    "hpux64-parisc2-gcc" => {
        inherit_from     => [ "BASE_unix", asm("parisc20_64_asm") ],
        cc               => "gcc",
        cflags           => combine(picker(default => "-DB_ENDIAN",
                                           debug   => "-O0 -g",
                                           release => "-O3"),
                                    threads("-D_REENTRANT")),
        ex_libs          => add("-ldl"),
        bn_ops           => "SIXTY_FOUR_BIT_LONG RC4_CHAR",
        thread_scheme    => "pthreads",
        dso_scheme       => "dlfcn",
        shared_target    => "hpux-shared",
        shared_cflag     => "-fpic",
        shared_ldflag    => "-shared",
        shared_extension => ".sl.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
        multilib         => "/pa20_64",
    },

    # More attempts at unified 10.X and 11.X targets for HP C compiler.
    #
    # Chris Ruemmler <ruemmler@cup.hp.com>
    # Kevin Steves <ks@hp.se>
    "hpux-parisc-cc" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "cc",
        cflags           => combine(picker(default => "+Optrs_strongly_typed -Ae +ESlit -DB_ENDIAN -DBN_DIV2W -DMD32_XARRAY",
                                           debug   => "+O0 +d -g",
                                           release => "+O3"),
                                    threads("-D_REENTRANT")),
        ex_libs          => add("-Wl,+s -ldld",threads("-lpthread")),
        bn_ops           => "RC4_CHAR",
        thread_scheme    => "pthreads",
        dso_scheme       => "dl",
        shared_target    => "hpux-shared",
        shared_cflag     => "+Z",
        shared_ldflag    => "-b",
        shared_extension => ".sl.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
    },
    "hpux-parisc1_1-cc" => {
        inherit_from     => [ "hpux-parisc-cc", asm("parisc11_asm") ],
        cflags           => add_before("+DA1.1"),
        multilib         => "/pa1.1",
    },
    "hpux64-parisc2-cc" => {
        inherit_from     => [ "BASE_unix", asm("parisc20_64_asm") ],
        cc               => "cc",
        cflags           => combine(picker(default => "+DD64 +Optrs_strongly_typed -Ae +ESlit -DB_ENDIAN -DMD32_XARRAY",
                                           debug   => "+O0 +d -g",
                                           release => "+O3"),
                                    threads("-D_REENTRANT")),
        ex_libs          => add("-ldl",threads("-lpthread")),
        bn_ops           => "SIXTY_FOUR_BIT_LONG RC4_CHAR",
        thread_scheme    => "pthreads",
        dso_scheme       => "dlfcn",
        shared_target    => "hpux-shared",
        shared_cflag     => "+Z",
        shared_ldflag    => "+DD64 -b",
        shared_extension => ".sl.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
        multilib         => "/pa20_64",
    },

    # HP/UX IA-64 targets
    "hpux-ia64-cc" => {
        inherit_from     => [ "BASE_unix", asm("ia64_asm") ],
        cc               => "cc",
        cflags           => combine(picker(default => "-Ae +DD32 +Olit=all -z -DB_ENDIAN",
                                           debug   => "+O0 +d -g",
                                           release => "+O2"),
                                    threads("-D_REENTRANT")),
        ex_libs          => add("-ldl",threads("-lpthread")),
        bn_ops           => "SIXTY_FOUR_BIT",
        thread_scheme    => "pthreads",
        dso_scheme       => "dlfcn",
        shared_target    => "hpux-shared",
        shared_cflag     => "+Z",
        shared_ldflag    => "+DD32 -b",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
        multilib         => "/hpux32",
    },
    # Frank Geurts <frank.geurts@nl.abnamro.com> has patiently assisted
    # with debugging of the following config.
    "hpux64-ia64-cc" => {
        inherit_from     => [ "BASE_unix", asm("ia64_asm") ],
        cc               => "cc",
        cflags           => combine(picker(default => "-Ae +DD64 +Olit=all -z -DB_ENDIAN",
                                           debug   => "+O0 +d -g",
                                           release => "+O3"),
                                    threads("-D_REENTRANT")),
        ex_libs          => add("-ldl", threads("-lpthread")),
        bn_ops           => "SIXTY_FOUR_BIT_LONG",
        thread_scheme    => "pthreads",
        dso_scheme       => "dlfcn",
        shared_target    => "hpux-shared",
        shared_cflag     => "+Z",
        shared_ldflag    => "+DD64 -b",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
        multilib         => "/hpux64",
    },
    # GCC builds...
    "hpux-ia64-gcc" => {
        inherit_from     => [ "BASE_unix", asm("ia64_asm") ],
        cc               => "gcc",
        cflags           => combine(picker(default => "-DB_ENDIAN",
                                           debug   => "-O0 -g",
                                           release => "-O3"),
                                    threads("-pthread")),
        ex_libs          => add("-ldl", threads("-pthread")),
        bn_ops           => "SIXTY_FOUR_BIT",
        thread_scheme    => "pthreads",
        dso_scheme       => "dlfcn",
        shared_target    => "hpux-shared",
        shared_cflag     => "-fpic",
        shared_ldflag    => "-shared",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
        multilib         => "/hpux32",
    },
    "hpux64-ia64-gcc" => {
        inherit_from     => [ "BASE_unix", asm("ia64_asm") ],
        cc               => "gcc",
        cflags           => combine(picker(default => "-mlp64 -DB_ENDIAN",
                                           debug   => "-O0 -g",
                                           release => "-O3"),
                                    threads("-pthread")),
        ex_libs          => add("-ldl", threads("-pthread")),
        bn_ops           => "SIXTY_FOUR_BIT_LONG",
        thread_scheme    => "pthreads",
        dso_scheme       => "dlfcn",
        shared_target    => "hpux-shared",
        shared_cflag     => "-fpic",
        shared_ldflag    => "-mlp64 -shared",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
        multilib         => "/hpux64",
    },

#### HP MPE/iX http://jazz.external.hp.com/src/openssl/
    "MPE/iX-gcc" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "gcc",
        cflags           => "-DBN_DIV2W -O3 -D_POSIX_SOURCE -D_SOCKET_SOURCE -I/SYSLOG/PUB",
        sys_id           => "MPE",
        ex_libs          => add("-L/SYSLOG/PUB -lsyslog -lsocket -lcurses"),
        thread_scheme    => "(unknown)",
        bn_ops           => "BN_LLONG",
    },

#### DEC Alpha Tru64 targets. Tru64 is marketing name for OSF/1 version 4
#### and forward. In reality 'uname -s' still returns "OSF1". Originally
#### there were even osf1-* configs targeting prior versions provided,
#### but not anymore...
    "tru64-alpha-gcc" => {
        inherit_from     => [ "BASE_unix", asm("alpha_asm") ],
        cc               => "gcc",
        cflags           => combine("-std=c9x -D_XOPEN_SOURCE=500 -D_OSF_SOURCE -O3",
                                    threads("-pthread")),
        ex_libs          => add("-lrt", threads("-pthread")), # for mlock(2)
        bn_ops           => "SIXTY_FOUR_BIT_LONG",
        thread_scheme    => "pthreads",
        dso_scheme       => "dlfcn",
        shared_target    => "alpha-osf1-shared",
        shared_extension => ".so",
    },
    "tru64-alpha-cc" => {
        inherit_from     => [ "BASE_unix", asm("alpha_asm") ],
        cc               => "cc",
        cflags           => combine("-std1 -D_XOPEN_SOURCE=500 -D_OSF_SOURCE -tune host -fast -readonly_strings",
                                    threads("-pthread")),
        ex_libs          => add("-lrt", threads("-pthread")), # for mlock(2)
        bn_ops           => "SIXTY_FOUR_BIT_LONG",
        thread_scheme    => "pthreads",
        dso_scheme       => "dlfcn",
        shared_target    => "alpha-osf1-shared",
        shared_ldflag    => "-msym",
        shared_extension => ".so",
    },

####
#### Variety of LINUX:-)
####
# *-generic* is endian-neutral target, but ./config is free to
# throw in -D[BL]_ENDIAN, whichever appropriate...
    "linux-generic32" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "gcc",
        cflags           => combine(picker(default => "-Wall",
                                           debug   => "-O0 -g",
                                           release => "-O3"),
                                    threads("-pthread")),
        ex_libs          => add("-ldl", threads("-pthread")),
        bn_ops           => "BN_LLONG RC4_CHAR",
        thread_scheme    => "pthreads",
        dso_scheme       => "dlfcn",
        shared_target    => "linux-shared",
        shared_cflag     => "-fPIC -DOPENSSL_USE_NODELETE",
        shared_ldflag    => "-Wl,-znodelete",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
    },
    "linux-generic64" => {
        inherit_from     => [ "linux-generic32" ],
        bn_ops           => "SIXTY_FOUR_BIT_LONG RC4_CHAR",
    },

    "linux-ppc" => {
        inherit_from     => [ "linux-generic32", asm("ppc32_asm") ],
        perlasm_scheme   => "linux32",
    },
    "linux-ppc64" => {
        inherit_from     => [ "linux-generic64", asm("ppc64_asm") ],
        cflags           => add("-m64 -DB_ENDIAN"),
        perlasm_scheme   => "linux64",
        shared_ldflag    => add("-m64"),
        multilib         => "64",
    },
    "linux-ppc64le" => {
        inherit_from     => [ "linux-generic64", asm("ppc64_asm") ],
        cflags           => add("-m64 -DL_ENDIAN"),
        perlasm_scheme   => "linux64le",
        shared_ldflag    => add("-m64"),
    },

    "linux-armv4" => {
        ################################################################
        # Note that -march is not among compiler options in linux-armv4
        # target description. Not specifying one is intentional to give
        # you choice to:
        #
        # a) rely on your compiler default by not specifying one;
        # b) specify your target platform explicitly for optimal
        # performance, e.g. -march=armv6 or -march=armv7-a;
        # c) build "universal" binary that targets *range* of platforms
        # by specifying minimum and maximum supported architecture;
        #
        # As for c) option. It actually makes no sense to specify
        # maximum to be less than ARMv7, because it's the least
        # requirement for run-time switch between platform-specific
        # code paths. And without run-time switch performance would be
        # equivalent to one for minimum. Secondly, there are some
        # natural limitations that you'd have to accept and respect.
        # Most notably you can *not* build "universal" binary for
        # big-endian platform. This is because ARMv7 processor always
        # picks instructions in little-endian order. Another similar
        # limitation is that -mthumb can't "cross" -march=armv6t2
        # boundary, because that's where it became Thumb-2. Well, this
        # limitation is a bit artificial, because it's not really
        # impossible, but it's deemed too tricky to support. And of
        # course you have to be sure that your binutils are actually
        # up to the task of handling maximum target platform. With all
        # this in mind here is an example of how to configure
        # "universal" build:
        #
        # ./Configure linux-armv4 -march=armv6 -D__ARM_MAX_ARCH__=8
        #
        inherit_from     => [ "linux-generic32", asm("armv4_asm") ],
        perlasm_scheme   => "linux32",
    },
    "linux-aarch64" => {
        inherit_from     => [ "linux-generic64", asm("aarch64_asm") ],
        perlasm_scheme   => "linux64",
    },
    "linux-arm64ilp32" => {  # https://wiki.linaro.org/Platform/arm64-ilp32
        inherit_from     => [ "linux-generic32", asm("aarch64_asm") ],
        cflags           => add("-mabi=ilp32"),
        bn_ops           => "SIXTY_FOUR_BIT RC4_CHAR",
        perlasm_scheme   => "linux64",
        shared_ldflag    => add("-mabi=ilp32"),
    },

    "linux-mips32" => {
        # Configure script adds minimally required -march for assembly
        # support, if no -march was specified at command line.
        inherit_from     => [ "linux-generic32", asm("mips32_asm") ],
        cflags           => add("-mabi=32 -DBN_DIV3W"),
        perlasm_scheme   => "o32",
        shared_ldflag    => add("-mabi=32"),
    },
    # mips32 and mips64 below refer to contemporary MIPS Architecture
    # specifications, MIPS32 and MIPS64, rather than to kernel bitness.
    "linux-mips64" => {
        inherit_from     => [ "linux-generic32", asm("mips64_asm") ],
        cflags           => add("-mabi=n32 -DBN_DIV3W"),
        bn_ops           => "SIXTY_FOUR_BIT RC4_CHAR",
        perlasm_scheme   => "n32",
        shared_ldflag    => add("-mabi=n32"),
        multilib         => "32",
    },
    "linux64-mips64" => {
        inherit_from     => [ "linux-generic64", asm("mips64_asm") ],
        cflags           => add("-mabi=64 -DBN_DIV3W"),
        perlasm_scheme   => "64",
        shared_ldflag    => add("-mabi=64"),
        multilib         => "64",
    },

    #### IA-32 targets...
    #### These two targets are a bit aged and are to be used on older Linux
    #### machines where gcc doesn't understand -m32 and -m64
    "linux-elf" => {
        inherit_from     => [ "linux-generic32", asm("x86_elf_asm") ],
        cflags           => add(picker(default => "-DL_ENDIAN",
                                       release => "-fomit-frame-pointer")),
        bn_ops           => "BN_LLONG",
    },
    "linux-aout" => {
        inherit_from     => [ "BASE_unix", asm("x86_asm") ],
        cc               => "gcc",
        cflags           => add(picker(default => "-DL_ENDIAN -Wall",
                                       debug   => "-O0 -g",
                                       release => "-O3 -fomit-frame-pointer")),
        bn_ops           => "BN_LLONG",
        thread_scheme    => "(unknown)",
        perlasm_scheme   => "a.out",
    },

    #### X86 / X86_64 targets
    "linux-x86" => {
        inherit_from     => [ "linux-generic32", asm("x86_asm") ],
        cflags           => add(picker(default => "-m32 -DL_ENDIAN",
                                       release => "-fomit-frame-pointer")),
        bn_ops           => "BN_LLONG",
        perlasm_scheme   => "elf",
        shared_ldflag    => add("-m32"),
    },
    "linux-x86-clang" => {
        inherit_from     => [ "linux-x86" ],
        cc               => "clang",
        cxx              => "clang++",
        cflags           => add("-Wextra -Qunused-arguments"),
    },
    "linux-x86_64" => {
        inherit_from     => [ "linux-generic64", asm("x86_64_asm") ],
        cflags           => add("-m64 -DL_ENDIAN"),
        bn_ops           => "SIXTY_FOUR_BIT_LONG",
        perlasm_scheme   => "elf",
        shared_ldflag    => add("-m64"),
        multilib         => "64",
    },
    "linux-x86_64-clang" => {
        inherit_from     => [ "linux-x86_64" ],
        cc               => "clang",
        cflags           => add("-Wextra -Qunused-arguments"),
    },
    "linux-x32" => {
        inherit_from     => [ "linux-generic32", asm("x86_64_asm") ],
        cflags           => add("-mx32 -DL_ENDIAN"),
        bn_ops           => "SIXTY_FOUR_BIT",
        perlasm_scheme   => "elf32",
        shared_ldflag    => add("-mx32"),
        multilib         => "x32",
    },

    "linux-ia64" => {
        inherit_from     => [ "linux-generic64", asm("ia64_asm") ],
        bn_ops           => "SIXTY_FOUR_BIT_LONG",
    },

    "linux64-s390x" => {
        inherit_from     => [ "linux-generic64", asm("s390x_asm") ],
        cflags           => add("-m64 -DB_ENDIAN"),
        perlasm_scheme   => "64",
        shared_ldflag    => add("-m64"),
        multilib         => "64",
    },
    "linux32-s390x" => {
        #### So called "highgprs" target for z/Architecture CPUs
        # "Highgprs" is kernel feature first implemented in Linux
        # 2.6.32, see /proc/cpuinfo. The idea is to preserve most
        # significant bits of general purpose registers not only
        # upon 32-bit process context switch, but even on
        # asynchronous signal delivery to such process. This makes
        # it possible to deploy 64-bit instructions even in legacy
        # application context and achieve better [or should we say
        # adequate] performance. The build is binary compatible with
        # linux-generic32, and the idea is to be able to install the
        # resulting libcrypto.so alongside generic one, e.g. as
        # /lib/highgprs/libcrypto.so.x.y, for ldconfig and run-time
        # linker to autodiscover. Unfortunately it doesn't work just
        # yet, because of couple of bugs in glibc
        # sysdeps/s390/dl-procinfo.c affecting ldconfig and ld.so.1...
        #
        inherit_from     => [ "linux-generic32", asm("s390x_asm") ],
        cflags           => add("-m31 -Wa,-mzarch -DB_ENDIAN"),
        bn_asm_src       => sub { my $r=join(" ",@_); $r=~s|asm/s390x\.S|bn_asm.c|; $r; },
        perlasm_scheme   => "31",
        shared_ldflag    => add("-m31"),
        multilib         => "/highgprs",
    },

    #### SPARC Linux setups
    # Ray Miller <ray.miller@computing-services.oxford.ac.uk> has
    # patiently assisted with debugging of following two configs.
    "linux-sparcv8" => {
        inherit_from     => [ "linux-generic32", asm("sparcv8_asm") ],
        cflags           => add("-mcpu=v8 -DB_ENDIAN -DBN_DIV2W"),
    },
    "linux-sparcv9" => {
        # it's a real mess with -mcpu=ultrasparc option under Linux,
        # but -Wa,-Av8plus should do the trick no matter what.
        inherit_from     => [ "linux-generic32", asm("sparcv9_asm") ],
        cflags           => add("-m32 -mcpu=ultrasparc -Wa,-Av8plus -DB_ENDIAN -DBN_DIV2W"),
        shared_ldflag    => add("-m32"),
    },
    "linux64-sparcv9" => {
        # GCC 3.1 is a requirement
        inherit_from     => [ "linux-generic64", asm("sparcv9_asm") ],
        cflags           => add("-m64 -mcpu=ultrasparc -DB_ENDIAN"),
        bn_ops           => "BN_LLONG RC4_CHAR",
        shared_ldflag    => add("-m64"),
        multilib         => "64",
    },

    "linux-alpha-gcc" => {
        inherit_from     => [ "linux-generic64", asm("alpha_asm") ],
        cflags           => add("-DL_ENDIAN"),
        bn_ops           => "SIXTY_FOUR_BIT_LONG",
    },
    "linux-c64xplus" => {
        inherit_from     => [ "BASE_unix" ],
        # TI_CGT_C6000_7.3.x is a requirement
        cc               => "cl6x",
        cflags           => combine("--linux -ea=.s -eo=.o -mv6400+ -o2 -ox -ms -pden -DOPENSSL_SMALL_FOOTPRINT",
                                    threads("-D_REENTRANT")),
        bn_ops           => "BN_LLONG",
        cpuid_asm_src    => "c64xpluscpuid.s",
        bn_asm_src       => "asm/bn-c64xplus.asm c64xplus-gf2m.s",
        aes_asm_src      => "aes-c64xplus.s aes_cbc.c aes-ctr.fake",
        sha1_asm_src     => "sha1-c64xplus.s sha256-c64xplus.s sha512-c64xplus.s",
        rc4_asm_src      => "rc4-c64xplus.s",
        modes_asm_src    => "ghash-c64xplus.s",
        chacha_asm_src   => "chacha-c64xplus.s",
        poly1305_asm_src => "poly1305-c64xplus.s",
        thread_scheme    => "pthreads",
        perlasm_scheme   => "void",
        dso_scheme       => "dlfcn",
        shared_target    => "linux-shared",
        shared_cflag     => "--pic",
        shared_ldflag    => add("-z --sysv --shared"),
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
        ranlib           => "true",
    },

#### Android: linux-* but without pointers to headers and libs.
    #
    # It takes pair of prior-set environment variables to make it work:
    #
    # CROSS_SYSROOT=/some/where/android-ndk-<ver>/platforms/android-<apiver>/arch-<arch>
    # CROSS_COMPILE=<prefix>
    #
    # As well as PATH adjusted to cover ${CROSS_COMPILE}gcc and company.
    # For example to compile for ICS and ARM with NDK 10d, you'd:
    #
    # ANDROID_NDK=/some/where/android-ndk-10d
    # CROSS_SYSROOT=$ANDROID_NDK/platforms/android-14/arch-arm
    # CROSS_COMPILE=arm-linux-androideabi-
    # PATH=$ANDROID_NDK/toolchains/arm-linux-androideabi-4.8/prebuild/linux-x86_64/bin
    #
    "android" => {
        inherit_from     => [ "linux-generic32" ],
        # Special note about unconditional -fPIC and -pie. The underlying
        # reason is that Lollipop refuses to run non-PIE. But what about
        # older systems and NDKs? -fPIC was never problem, so the only
        # concern is -pie. Older toolchains, e.g. r4, appear to handle it
        # and binaries turn mostly functional. "Mostly" means that oldest
        # Androids, such as Froyo, fail to handle executable, but newer
        # systems are perfectly capable of executing binaries targeting
        # Froyo. Keep in mind that in the nutshell Android builds are
        # about JNI, i.e. shared libraries, not applications.
        cflags           => add(picker(default => "-mandroid -fPIC --sysroot=\$(CROSS_SYSROOT) -Wa,--noexecstack")),
        bin_cflags       => "-pie",
    },
    "android-x86" => {
        inherit_from     => [ "android", asm("x86_asm") ],
        cflags           => add(picker(release => "-fomit-frame-pointer")),
        bn_ops           => "BN_LLONG",
        perlasm_scheme   => "android",
    },
    ################################################################
    # Contemporary Android applications can provide multiple JNI
    # providers in .apk, targeting multiple architectures. Among
    # them there is "place" for two ARM flavours: generic eabi and
    # armv7-a/hard-float. However, it should be noted that OpenSSL's
    # ability to engage NEON is not constrained by ABI choice, nor
    # is your ability to call OpenSSL from your application code
    # compiled with floating-point ABI other than default 'soft'.
    # [Latter thanks to __attribute__((pcs("aapcs"))) declaration.]
    # This means that choice of ARM libraries you provide in .apk
    # is driven by application needs. For example if application
    # itself benefits from NEON or is floating-point intensive, then
    # it might be appropriate to provide both libraries. Otherwise
    # just generic eabi would do. But in latter case it would be
    # appropriate to
    #
    #   ./Configure android-armeabi -D__ARM_MAX_ARCH__=8
    #
    # in order to build "universal" binary and allow OpenSSL take
    # advantage of NEON when it's available.
    #
    "android-armeabi" => {
        inherit_from     => [ "android", asm("armv4_asm") ],
    },
    "android-mips" => {
        inherit_from     => [ "android", asm("mips32_asm") ],
        perlasm_scheme   => "o32",
    },

    "android64" => {
        inherit_from     => [ "linux-generic64" ],
        cflags           => add(picker(default => "-mandroid -fPIC --sysroot=\$(CROSS_SYSROOT) -Wa,--noexecstack")),
        bin_cflags       => "-pie",
    },
    "android64-aarch64" => {
        inherit_from     => [ "android64", asm("aarch64_asm") ],
        perlasm_scheme   => "linux64",
    },

#### *BSD
    "BSD-generic32" => {
        # As for thread cflag. Idea is to maintain "collective" set of
        # flags, which would cover all BSD flavors. -pthread applies
        # to them all, but is treated differently. OpenBSD expands is
        # as -D_POSIX_THREAD -lc_r, which is sufficient. FreeBSD 4.x
        # expands it as -lc_r, which has to be accompanied by explicit
        # -D_THREAD_SAFE and sometimes -D_REENTRANT. FreeBSD 5.x
        # expands it as -lc_r, which seems to be sufficient?
        inherit_from     => [ "BASE_unix" ],
        cc               => "cc",
        cflags           => combine(picker(default => "-Wall",
                                           debug   => "-O0 -g",
                                           release => "-O3"),
                                    threads("-pthread -D_THREAD_SAFE -D_REENTRANT")),
        bn_ops           => "BN_LLONG",
        thread_scheme    => "pthreads",
        dso_scheme       => "dlfcn",
        shared_target    => "bsd-gcc-shared",
        shared_cflag     => "-fPIC",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
    },
    "BSD-generic64" => {
        inherit_from     => [ "BSD-generic32" ],
        bn_ops           => "SIXTY_FOUR_BIT_LONG",
    },

    "BSD-x86" => {
        inherit_from     => [ "BSD-generic32", asm("x86_asm") ],
        cflags           => add(picker(default => "-DL_ENDIAN",
                                       release => "-fomit-frame-pointer")),
        bn_ops           => "BN_LLONG",
        shared_target    => "bsd-shared",
        perlasm_scheme   => "a.out",
    },
    "BSD-x86-elf" => {
        inherit_from     => [ "BSD-x86" ],
        perlasm_scheme   => "elf",
    },

    "BSD-sparcv8" => {
        inherit_from     => [ "BSD-generic32", asm("sparcv8_asm") ],
        cflags           => add("-mcpu=v8 -DB_ENDIAN"),
    },
    "BSD-sparc64" => {
        # -DMD32_REG_T=int doesn't actually belong in sparc64 target, it
        # simply *happens* to work around a compiler bug in gcc 3.3.3,
        # triggered by RIPEMD160 code.
        inherit_from     => [ "BSD-generic64", asm("sparcv9_asm") ],
        cflags           => add("-DB_ENDIAN -DMD32_REG_T=int"),
        bn_ops           => "BN_LLONG",
    },

    "BSD-ia64" => {
        inherit_from     => [ "BSD-generic64", asm("ia64_asm") ],
        cflags           => add_before("-DL_ENDIAN"),
        bn_ops           => "SIXTY_FOUR_BIT_LONG",
    },

    "BSD-x86_64" => {
        inherit_from     => [ "BSD-generic64", asm("x86_64_asm") ],
        cflags           => add_before("-DL_ENDIAN"),
        bn_ops           => "SIXTY_FOUR_BIT_LONG",
        perlasm_scheme   => "elf",
    },

    "bsdi-elf-gcc" => {
        inherit_from     => [ "BASE_unix", asm("x86_elf_asm") ],
        cc               => "gcc",
        cflags           => "-DPERL5 -DL_ENDIAN -fomit-frame-pointer -O3 -Wall",
        ex_libs          => add("-ldl"),
        bn_ops           => "BN_LLONG",
        thread_scheme    => "(unknown)",
        dso_scheme       => "dlfcn",
        shared_target    => "bsd-gcc-shared",
        shared_cflag     => "-fPIC",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
    },

    "nextstep" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "cc",
        cflags           => "-O -Wall",
        unistd           => "<libc.h>",
        bn_ops           => "BN_LLONG",
        thread_scheme    => "(unknown)",
    },
    "nextstep3.3" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "cc",
        cflags           => "-O3 -Wall",
        unistd           => "<libc.h>",
        bn_ops           => "BN_LLONG",
        thread_scheme    => "(unknown)",
    },

# QNX
    "qnx4" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "cc",
        cflags           => "-DL_ENDIAN -DTERMIO",
        thread_scheme    => "(unknown)",
    },
    "QNX6" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "gcc",
        ex_libs          => add("-lsocket"),
        dso_scheme       => "dlfcn",
        shared_target    => "bsd-gcc-shared",
        shared_cflag     => "-fPIC",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
    },
    "QNX6-i386" => {
        inherit_from     => [ "BASE_unix", asm("x86_elf_asm") ],
        cc               => "gcc",
        cflags           => "-DL_ENDIAN -O2 -Wall",
        ex_libs          => add("-lsocket"),
        dso_scheme       => "dlfcn",
        shared_target    => "bsd-gcc-shared",
        shared_cflag     => "-fPIC",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
    },

#### SCO/Caldera targets.
#
# Originally we had like unixware-*, unixware-*-pentium, unixware-*-p6, etc.
# Now we only have blended unixware-* as it's the only one used by ./config.
# If you want to optimize for particular microarchitecture, bypass ./config
# and './Configure unixware-7 -Kpentium_pro' or whatever appropriate.
# Note that not all targets include assembler support. Mostly because of
# lack of motivation to support out-of-date platforms with out-of-date
# compiler drivers and assemblers. Tim Rice <tim@multitalents.net> has
# patiently assisted to debug most of it.
#
# UnixWare 2.0x fails destest with -O.
    "unixware-2.0" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "cc",
        cflags           => combine("-DFILIO_H -DNO_STRINGS_H",
                                    threads("-Kthread")),
        ex_libs          => add("-lsocket -lnsl -lresolv -lx"),
        thread_scheme    => "uithreads",
    },
    "unixware-2.1" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "cc",
        cflags           => combine("-O -DFILIO_H",
                                    threads("-Kthread")),
        ex_libs          => add("-lsocket -lnsl -lresolv -lx"),
        thread_scheme    => "uithreads",
    },
    "unixware-7" => {
        inherit_from     => [ "BASE_unix", asm("x86_elf_asm") ],
        cc               => "cc",
        cflags           => combine("-O -DFILIO_H -Kalloca",
                                    threads("-Kthread")),
        ex_libs          => add("-lsocket -lnsl"),
        thread_scheme    => "uithreads",
        bn_ops           => "BN_LLONG",
        perlasm_scheme   => "elf-1",
        dso_scheme       => "dlfcn",
        shared_target    => "svr5-shared",
        shared_cflag     => "-Kpic",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
    },
    "unixware-7-gcc" => {
        inherit_from     => [ "BASE_unix", asm("x86_elf_asm") ],
        cc               => "gcc",
        cflags           => combine("-DL_ENDIAN -DFILIO_H -O3 -fomit-frame-pointer -Wall",
                                    threads("-D_REENTRANT")),
        ex_libs          => add("-lsocket -lnsl"),
        bn_ops           => "BN_LLONG",
        thread_scheme    => "pthreads",
        perlasm_scheme   => "elf-1",
        dso_scheme       => "dlfcn",
        shared_target    => "gnu-shared",
        shared_cflag     => "-fPIC",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
    },
# SCO 5 - Ben Laurie <ben@algroup.co.uk> says the -O breaks the SCO cc.
    "sco5-cc" => {
        inherit_from     => [ "BASE_unix", asm("x86_elf_asm") ],
        cc               => "cc",
        cflags           => "-belf",
        ex_libs          => add("-lsocket -lnsl"),
        thread_scheme    => "(unknown)",
        perlasm_scheme   => "elf-1",
        dso_scheme       => "dlfcn",
        shared_target    => "svr3-shared",
        shared_cflag     => "-Kpic",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
    },
    "sco5-gcc" => {
        inherit_from     => [ "BASE_unix", asm("x86_elf_asm") ],
        cc               => "gcc",
        cflags           => "-O3 -fomit-frame-pointer",
        ex_libs          => add("-lsocket -lnsl"),
        bn_ops           => "BN_LLONG",
        thread_scheme    => "(unknown)",
        perlasm_scheme   => "elf-1",
        dso_scheme       => "dlfcn",
        shared_target    => "svr3-shared",
        shared_cflag     => "-fPIC",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
    },

#### IBM's AIX.
    # Below targets assume AIX >=5. Caveat lector. If you are accustomed
    # to control compilation "bitness" by setting $OBJECT_MODE environment
    # variable, then you should know that in OpenSSL case it's considered
    # only in ./config. Once configured, build procedure remains "deaf" to
    # current value of $OBJECT_MODE.
    "aix-gcc" => {
        inherit_from     => [ "BASE_unix", asm("ppc32_asm") ],
        cc               => "gcc",
        cflags           => combine(picker(default => "-DB_ENDIAN",
                                           debug   => "-O0 -g",
                                           release => "-O"),
                                    threads("-pthread")),
        ex_libs          => add(threads("-pthread")),
        sys_id           => "AIX",
        bn_ops           => "BN_LLONG RC4_CHAR",
        thread_scheme    => "pthreads",
        perlasm_scheme   => "aix32",
        dso_scheme       => "dlfcn",
        shared_target    => "aix-shared",
        shared_ldflag    => "-shared -static-libgcc -Wl,-G",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
        arflags          => "-X32",
    },
    "aix64-gcc" => {
        inherit_from     => [ "BASE_unix", asm("ppc64_asm") ],
        cc               => "gcc",
        cflags           => combine(picker(default => "-maix64 -DB_ENDIAN",
                                           debug   => "-O0 -g",
                                           release => "-O"),
                                    threads("-pthread")),
        ex_libs          => add(threads("-pthread")),
        sys_id           => "AIX",
        bn_ops           => "SIXTY_FOUR_BIT_LONG RC4_CHAR",
        thread_scheme    => "pthreads",
        perlasm_scheme   => "aix64",
        dso_scheme       => "dlfcn",
        shared_target    => "aix-shared",
        shared_ldflag    => "-maix64 -shared -static-libgcc -Wl,-G",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
        arflags          => "-X64",
    },
    "aix-cc" => {
        inherit_from     => [ "BASE_unix", asm("ppc32_asm") ],
        cc               => "cc",
        cflags           => combine(picker(default => "-q32 -DB_ENDIAN -qmaxmem=16384 -qro -qroconst",
                                           debug   => "-O0 -g",
                                           release => "-O"),
                                    threads("-qthreaded -D_THREAD_SAFE")),
        sys_id           => "AIX",
        bn_ops           => "BN_LLONG RC4_CHAR",
        thread_scheme    => "pthreads",
        ex_libs          => threads("-lpthreads"),
        perlasm_scheme   => "aix32",
        dso_scheme       => "dlfcn",
        shared_target    => "aix-shared",
        shared_ldflag    => "-q32 -G",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
        arflags          => "-X 32",
    },
    "aix64-cc" => {
        inherit_from     => [ "BASE_unix", asm("ppc64_asm") ],
        cc               => "cc",
        cflags           => combine(picker(default => "-q64 -DB_ENDIAN -qmaxmem=16384 -qro -qroconst",
                                           debug   => "-O0 -g",
                                           release => "-O"),
                                    threads("-qthreaded -D_THREAD_SAFE")),
        sys_id           => "AIX",
        bn_ops           => "SIXTY_FOUR_BIT_LONG RC4_CHAR",
        thread_scheme    => "pthreads",
        ex_libs          => threads("-lpthreads"),
        perlasm_scheme   => "aix64",
        dso_scheme       => "dlfcn",
        shared_target    => "aix-shared",
        shared_ldflag    => "-q64 -G",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
        arflags          => "-X 64",
    },

# SIEMENS BS2000/OSD: an EBCDIC-based mainframe
    "BS2000-OSD" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "c89",
        cflags           => "-O -XLLML -XLLMK -XL -DB_ENDIAN -DCHARSET_EBCDIC",
        ex_libs          => add("-lsocket -lnsl"),
        bn_ops           => "THIRTY_TWO_BIT RC4_CHAR",
        thread_scheme    => "(unknown)",
    },

#### Visual C targets
#
# Win64 targets, WIN64I denotes IA-64 and WIN64A - AMD64
#
# Note about -wd4090, disable warning C4090. This warning returns false
# positives in some situations. Disabling it altogether masks both
# legitimate and false cases, but as we compile on multiple platforms,
# we rely on other compilers to catch legitimate cases.
#
# Also note that we force threads no matter what.  Configuring "no-threads"
# is ignored.
    "VC-common" => {
        inherit_from     => [ "BASE_Windows" ],
        template         => 1,
        cc               => "cl",
        cflags           => "-W3 -wd4090 -Gs0 -GF -Gy -nologo -DOPENSSL_SYS_WIN32 -DWIN32_LEAN_AND_MEAN -DL_ENDIAN -D_CRT_SECURE_NO_DEPRECATE",
        defines          => add(sub { my @defs = ();
                                      unless ($disabled{"zlib-dynamic"}) {
                                          my $zlib =
                                              $withargs{zlib_lib} // "ZLIB1";
                                          push @defs,
                                              quotify("perl",
                                                      'LIBZ="' . $zlib . '"');
                                      }
                                      return [ @defs ];
                                    }),
        coutflag         => "/Fo",
        lib_cflags       => add("/Zi /Fdossl_static"),
        dso_cflags       => "/Zi /Fddso",
        bin_cflags       => "/Zi /Fdapp",
        lflags           => add("/debug"),
        shared_ldflag    => "/dll",
        shared_target    => "win-shared", # meaningless except it gives Configure a hint
        thread_scheme    => "winthreads",
        dso_scheme       => "win32",
        apps_aux_src     => add("win32_init.c"),
    },
    "VC-noCE-common" => {
        inherit_from     => [ "VC-common" ],
        template         => 1,
        cflags           => add(picker(default => "-DUNICODE -D_UNICODE",
                                       debug   =>
                                       sub {
                                           ($disabled{shared} ? "" : "/MDd")
                                               ." /Od -DDEBUG -D_DEBUG";
                                       },
                                       release =>
                                       sub {
                                           ($disabled{shared} ? "" : "/MD")
                                               ." /O2";
                                       })),
        lib_cflags       => add(sub { $disabled{shared} ? "/MT /Zl" : () }),
        # Following might/should appears controversial, i.e. defining
        # /MDd without evaluating $disabled{shared}. It works in
        # non-shared build because static library is compiled with /Zl
        # and bares no reference to specific RTL. And it works in
        # shared build because multiple /MDd options are not prohibited.
        # But why /MDd in static build? Well, basically this is just a
        # reference point, which allows to catch eventual errors that
        # would prevent those who want to wrap OpenSSL into own .DLL.
        # Why not /MD in release build then? Well, some are likely to
        # prefer [non-debug] openssl.exe to be free from Micorosoft RTL
        # redistributable.
        bin_cflags       => add(picker(debug   => "/MDd",
                                       release => sub { $disabled{shared} ? "/MT" : () },
                                      )),
        bin_lflags       => add("/subsystem:console /opt:ref"),
        ex_libs          => add(sub {
            my @ex_libs = ();
            push @ex_libs, 'ws2_32.lib' unless $disabled{sock};
            push @ex_libs, 'gdi32.lib advapi32.lib crypt32.lib user32.lib';
            return join(" ", @ex_libs);
        }),
    },
    "VC-WIN64-common" => {
        inherit_from     => [ "VC-noCE-common" ],
        template         => 1,
        ex_libs          => add(sub {
            my @ex_libs = ();
            push @ex_libs, 'bufferoverflowu.lib' if (`cl 2>&1` =~ /14\.00\.4[0-9]{4}\./);
            return join(" ", @_, @ex_libs);
        }),
        bn_ops           => "SIXTY_FOUR_BIT EXPORT_VAR_AS_FN",
        build_scheme     => add("VC-W64", { separator => undef }),
    },
    "VC-WIN64I" => {
        inherit_from     => [ "VC-WIN64-common", asm("ia64_asm"),
                              sub { $disabled{shared} ? () : "ia64_uplink" } ],
        as               => "ias",
        asflags          => "-d debug",
        asoutflag        => "-o",
        sys_id           => "WIN64I",
        bn_asm_src       => sub { return undef unless @_;
                                  my $r=join(" ",@_); $r=~s|bn-ia64.s|bn_asm.c|; $r; },
        perlasm_scheme   => "ias",
        multilib         => "-ia64",
    },
    "VC-WIN64A" => {
        inherit_from     => [ "VC-WIN64-common", asm("x86_64_asm"),
                              sub { $disabled{shared} ? () : "x86_64_uplink" } ],
        as               => sub { vc_win64a_info()->{as} },
        asflags          => sub { vc_win64a_info()->{asflags} },
        asoutflag        => sub { vc_win64a_info()->{asoutflag} },
        sys_id           => "WIN64A",
        bn_asm_src       => sub { return undef unless @_;
                                  my $r=join(" ",@_); $r=~s|asm/x86_64-gcc|bn_asm|; $r; },
        perlasm_scheme   => "auto",
        multilib         => "-x64",
    },
    "VC-WIN32" => {
        # x86 Win32 target defaults to ANSI API, if you want UNICODE,
        # configure with 'perl Configure VC-WIN32 -DUNICODE -D_UNICODE'
        inherit_from     => [ "VC-noCE-common", asm("x86_asm"),
                              sub { $disabled{shared} ? () : "uplink_common" } ],
        as               => sub { vc_win32_info()->{as} },
        asflags          => sub { vc_win32_info()->{asflags} },
        asoutflag        => sub { vc_win32_info()->{asoutflag} },
        ex_libs          => add(sub {
            my @ex_libs = ();
            # WIN32 UNICODE build gets linked with unicows.lib for
            # backward compatibility with Win9x.
            push @ex_libs, 'unicows.lib'
                if (grep { $_ eq "UNICODE" } @user_defines);
            return join(" ", @ex_libs, @_);
        }),
        sys_id           => "WIN32",
        bn_ops           => "BN_LLONG EXPORT_VAR_AS_FN",
        perlasm_scheme   => sub { vc_win32_info()->{perlasm_scheme} },
        build_scheme     => add("VC-W32", { separator => undef }),
    },
    "VC-CE" => {
        inherit_from     => [ "VC-common" ],
        as               => "ml",
        asflags          => "/nologo /Cp /coff /c /Cx /Zi",
        asoutflag        => "/Fo",
        cc               => "cl",
        cflags           =>
            picker(default =>
                   combine('/W3 /WX /GF /Gy /nologo -DUNICODE -D_UNICODE -DOPENSSL_SYS_WINCE -DWIN32_LEAN_AND_MEAN -DL_ENDIAN -DDSO_WIN32 -DNO_CHMOD -DOPENSSL_SMALL_FOOTPRINT',
                           sub { vc_wince_info()->{cflags}; },
                           sub { defined($ENV{'WCECOMPAT'})
                                     ? '-I$(WCECOMPAT)/include' : (); },
                           sub { defined($ENV{'PORTSDK_LIBPATH'})
                                     ? '-I$(PORTSDK_LIBPATH)/../../include' : (); },
                           sub { `cl 2>&1` =~ /Version ([0-9]+)\./ && $1>=14
                                     ? ($disabled{shared} ? " /MT" : " /MD")
                                     : " /MC"; }),
                   debug   => "/Od -DDEBUG -D_DEBUG",
                   release => "/O1i"),
        lflags           => combine("/nologo /opt:ref",
                                    sub { vc_wince_info()->{lflags}; },
                                    sub { defined($ENV{PORTSDK_LIBPATH})
                                              ? "/entry:mainCRTstartup" : (); }),
        sys_id           => "WINCE",
        bn_ops           => "BN_LLONG EXPORT_VAR_AS_FN",
        ex_libs          => add(sub {
            my @ex_libs = ();
            push @ex_libs, 'ws2.lib' unless $disabled{sock};
            push @ex_libs, 'crypt32.lib';
            if (defined($ENV{WCECOMPAT})) {
                my $x = '$(WCECOMPAT)/lib';
                if (-f "$x/$ENV{TARGETCPU}/wcecompatex.lib") {
                    $x .= '/$(TARGETCPU)/wcecompatex.lib';
                } else {
                    $x .= '/wcecompatex.lib';
                }
                push @ex_libs, $x;
            }
            push @ex_libs, '$(PORTSDK_LIBPATH)/portlib.lib'
                if (defined($ENV{'PORTSDK_LIBPATH'}));
            push @ex_libs, ' /nodefaultlib coredll.lib corelibc.lib'
                if ($ENV{'TARGETCPU'} eq "X86");
            return @ex_libs;
        }),
        build_scheme     => add("VC-WCE", { separator => undef }),
    },

#### MinGW
    "mingw" => {
        inherit_from     => [ "BASE_unix", asm("x86_asm"),
                              sub { $disabled{shared} ? () : "x86_uplink" } ],
        cc               => "gcc",
        cflags           => combine(picker(default => "-DL_ENDIAN -DWIN32_LEAN_AND_MEAN -DUNICODE -D_UNICODE -m32 -Wall",
                                           debug   => "-g -O0",
                                           release => "-O3 -fomit-frame-pointer"),
                                    threads("-D_MT")),
        sys_id           => "MINGW32",
        ex_libs          => add("-lws2_32 -lgdi32 -lcrypt32"),
        bn_ops           => "BN_LLONG EXPORT_VAR_AS_FN",
        thread_scheme    => "winthreads",
        perlasm_scheme   => "coff",
        dso_scheme       => "win32",
        shared_target    => "mingw-shared",
        shared_cflag     => add("-D_WINDLL"),
        shared_ldflag    => "-static-libgcc",
        shared_rcflag    => "--target=pe-i386",
        shared_extension => ".dll",
        multilib         => "",
        apps_aux_src     => add("win32_init.c"),
    },
    "mingw64" => {
        # As for OPENSSL_USE_APPLINK. Applink makes it possible to use
        # .dll compiled with one compiler with application compiled with
        # another compiler. It's possible to engage Applink support in
        # mingw64 build, but it's not done, because till mingw64
        # supports structured exception handling, one can't seriously
        # consider its binaries for using with non-mingw64 run-time
        # environment. And as mingw64 is always consistent with itself,
        # Applink is never engaged and can as well be omitted.
        inherit_from     => [ "BASE_unix", asm("x86_64_asm") ],
        cc               => "gcc",
        cflags           => combine(picker(default => "-DL_ENDIAN -DWIN32_LEAN_AND_MEAN -DUNICODE -D_UNICODE -m64 -Wall",
                                           debug   => "-g -O0",
                                           release => "-O3"),
                                    threads("-D_MT")),
        sys_id           => "MINGW64",
        ex_libs          => add("-lws2_32 -lgdi32 -lcrypt32"),
        bn_ops           => "SIXTY_FOUR_BIT EXPORT_VAR_AS_FN",
        thread_scheme    => "winthreads",
        perlasm_scheme   => "mingw64",
        dso_scheme       => "win32",
        shared_target    => "mingw-shared",
        shared_cflag     => add("-D_WINDLL"),
        shared_ldflag    => "-static-libgcc",
        shared_rcflag    => "--target=pe-x86-64",
        shared_extension => ".dll",
        multilib         => "64",
        apps_aux_src     => add("win32_init.c"),
    },

#### UEFI
    "UEFI" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "cc",
        cflags           => "-DL_ENDIAN -O",
        sys_id           => "UEFI",
    },

#### UWIN
    "UWIN" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "cc",
        cflags           => "-DTERMIOS -DL_ENDIAN -O -Wall",
        sys_id           => "UWIN",
        bn_ops           => "BN_LLONG",
        dso_scheme       => "win32",
    },

#### Cygwin
    "Cygwin-x86" => {
        inherit_from     => [ "BASE_unix", asm("x86_asm") ],
        cc               => "gcc",
        cflags           => picker(default => "-DTERMIOS -DL_ENDIAN -Wall",
                                   debug   => "-g -O0",
                                   release => "-O3 -fomit-frame-pointer"),
        sys_id           => "CYGWIN",
        bn_ops           => "BN_LLONG",
        thread_scheme    => "pthread",
        perlasm_scheme   => "coff",
        dso_scheme       => "dlfcn",
        shared_target    => "cygwin-shared",
        shared_cflag     => "-D_WINDLL",
        shared_ldflag    => "-shared",
        shared_extension => ".dll",
    },
    "Cygwin-x86_64" => {
        inherit_from     => [ "BASE_unix", asm("x86_64_asm") ],
        cc               => "gcc",
        cflags           => picker(default => "-DTERMIOS -DL_ENDIAN -Wall",
                                   debug   => "-g -O0",
                                   release => "-O3"),
        sys_id           => "CYGWIN",
        bn_ops           => "SIXTY_FOUR_BIT_LONG",
        thread_scheme    => "pthread",
        perlasm_scheme   => "mingw64",
        dso_scheme       => "dlfcn",
        shared_target    => "cygwin-shared",
        shared_cflag     => "-D_WINDLL",
        shared_ldflag    => "-shared",
        shared_extension => ".dll",
    },
    # Backward compatibility for those using this target
    "Cygwin" => {
	inherit_from     => [ "Cygwin-x86" ]
    },
    # In case someone constructs the Cygwin target name themself
    "Cygwin-i386" => {
	inherit_from     => [ "Cygwin-x86" ]
    },
    "Cygwin-i486" => {
	inherit_from     => [ "Cygwin-x86" ]
    },
    "Cygwin-i586" => {
	inherit_from     => [ "Cygwin-x86" ]
    },
    "Cygwin-i686" => {
	inherit_from     => [ "Cygwin-x86" ]
    },

##### MacOS X (a.k.a. Darwin) setup
    "darwin-common" => {
        inherit_from     => [ "BASE_unix" ],
        template         => 1,
        cc               => "cc",
        cflags           => combine(picker(default => "",
                                           debug   => "-g -O0",
                                           release => "-O3"),
                                   threads("-D_REENTRANT")),
        sys_id           => "MACOSX",
        plib_lflags      => "-Wl,-search_paths_first",
        bn_ops           => "BN_LLONG RC4_CHAR",
        thread_scheme    => "pthreads",
        perlasm_scheme   => "osx32",
        dso_scheme       => "dlfcn",
        ranlib           => "ranlib -c",
        shared_target    => "darwin-shared",
        shared_cflag     => "-fPIC",
        shared_ldflag    => "-dynamiclib",
        shared_extension => ".\$(SHLIB_MAJOR).\$(SHLIB_MINOR).dylib",
    },
    # Option "freeze" such as -std=gnu9x can't negatively interfere
    # with future defaults for below two targets, because MacOS X
    # for PPC has no future, it was discontinued by vendor in 2009.
    "darwin-ppc-cc" => {
        inherit_from     => [ "darwin-common", asm("ppc32_asm") ],
        cflags           => add("-arch ppc -std=gnu9x -DB_ENDIAN -Wa,-force_cpusubtype_ALL"),
        perlasm_scheme   => "osx32",
        shared_cflag     => add("-fno-common"),
        shared_ldflag    => "-arch ppc -dynamiclib",
    },
    "darwin64-ppc-cc" => {
        inherit_from     => [ "darwin-common", asm("ppc64_asm") ],
        cflags           => add("-arch ppc64 -std=gnu9x -DB_ENDIAN"),
        bn_ops           => "SIXTY_FOUR_BIT_LONG RC4_CHAR",
        perlasm_scheme   => "osx64",
        shared_ldflag    => "-arch ppc64 -dynamiclib",
    },
    "darwin-i386-cc" => {
        inherit_from     => [ "darwin-common", asm("x86_asm") ],
        cflags           => add(picker(default => "-arch i386 -DL_ENDIAN",
                                       release => "-fomit-frame-pointer")),
        bn_ops           => "BN_LLONG RC4_INT",
        perlasm_scheme   => "macosx",
        shared_ldflag    => "-arch i386 -dynamiclib",
    },
    "darwin64-x86_64-cc" => {
        inherit_from     => [ "darwin-common", asm("x86_64_asm") ],
        cflags           => add("-arch x86_64 -DL_ENDIAN -Wall"),
        bn_ops           => "SIXTY_FOUR_BIT_LONG",
        perlasm_scheme   => "macosx",
        shared_ldflag    => "-arch x86_64 -dynamiclib",
    },

#### iPhoneOS/iOS
#
# It takes three prior-set environment variables to make it work:
#
# CROSS_COMPILE=/where/toolchain/is/usr/bin/ [note ending slash]
# CROSS_TOP=/where/SDKs/are
# CROSS_SDK=iPhoneOSx.y.sdk
#
# Exact paths vary with Xcode releases, but for couple of last ones
# they would look like this:
#
# CROSS_COMPILE=`xcode-select --print-path`/Toolchains/XcodeDefault.xctoolchain/usr/bin/
# CROSS_TOP=`xcode-select --print-path`/Platforms/iPhoneOS.platform/Developer
# CROSS_SDK=iPhoneOS.sdk
#
    "iphoneos-cross" => {
        inherit_from     => [ "darwin-common" ],
        cflags           => add("-isysroot \$(CROSS_TOP)/SDKs/\$(CROSS_SDK) -fno-common"),
        sys_id           => "iOS",
    },
    "ios-cross" => {
        inherit_from     => [ "darwin-common", asm("armv4_asm") ],
        # It should be possible to go below iOS 6 and even add -arch armv6,
        # thus targeting iPhone pre-3GS, but it's assumed to be irrelevant
        # at this point.
        cflags           => add("-arch armv7 -mios-version-min=6.0.0 -isysroot \$(CROSS_TOP)/SDKs/\$(CROSS_SDK) -fno-common"),
        sys_id           => "iOS",
        perlasm_scheme   => "ios32",
    },
    "ios64-cross" => {
        inherit_from     => [ "darwin-common", asm("aarch64_asm") ],
        cflags           => add("-arch arm64 -mios-version-min=7.0.0 -isysroot \$(CROSS_TOP)/SDKs/\$(CROSS_SDK) -fno-common"),
        sys_id           => "iOS",
        bn_ops           => "SIXTY_FOUR_BIT_LONG RC4_CHAR",
        perlasm_scheme   => "ios64",
    },

##### GNU Hurd
    "hurd-x86" => {
        inherit_from     => [ "BASE_unix" ],
        inherit_from     => [ asm("x86_elf_asm") ],
        cc               => "gcc",
        cflags           => combine("-DL_ENDIAN -O3 -fomit-frame-pointer -Wall",
                                    threads("-pthread")),
        ex_libs          => add("-ldl", threads("-pthread")),
        bn_ops           => "BN_LLONG",
        thread_scheme    => "pthreads",
        dso_scheme       => "dlfcn",
        shared_target    => "linux-shared",
        shared_cflag     => "-fPIC",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
    },

##### VxWorks for various targets
    "vxworks-ppc60x" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "ccppc",
        cflags           => "-D_REENTRANT -mrtp -mhard-float -mstrict-align -fno-implicit-fp -DPPC32_fp60x -O2 -fstrength-reduce -fno-builtin -fno-strict-aliasing -Wall -DCPU=PPC32 -DTOOL_FAMILY=gnu -DTOOL=gnu -I\$(WIND_BASE)/target/usr/h -I\$(WIND_BASE)/target/usr/h/wrn/coreip",
        sys_id           => "VXWORKS",
        ex_libs          => add("-Wl,--defsym,__wrs_rtp_base=0xe0000000 -L \$(WIND_BASE)/target/usr/lib/ppc/PPC32/common"),
    },
    "vxworks-ppcgen" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "ccppc",
        cflags           => "-D_REENTRANT -mrtp -msoft-float -mstrict-align -O1 -fno-builtin -fno-strict-aliasing -Wall -DCPU=PPC32 -DTOOL_FAMILY=gnu -DTOOL=gnu -I\$(WIND_BASE)/target/usr/h -I\$(WIND_BASE)/target/usr/h/wrn/coreip",
        sys_id           => "VXWORKS",
        ex_libs          => add("-Wl,--defsym,__wrs_rtp_base=0xe0000000 -L \$(WIND_BASE)/target/usr/lib/ppc/PPC32/sfcommon"),
    },
    "vxworks-ppc405" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "ccppc",
        cflags           => "-g -msoft-float -mlongcall -DCPU=PPC405 -I\$(WIND_BASE)/target/h",
        sys_id           => "VXWORKS",
        lflags           => "-r",
    },
    "vxworks-ppc750" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "ccppc",
        cflags           => "-ansi -nostdinc -DPPC750 -D_REENTRANT -fvolatile -fno-builtin -fno-for-scope -fsigned-char -Wall -msoft-float -mlongcall -DCPU=PPC604 -I\$(WIND_BASE)/target/h \$(DEBUG_FLAG)",
        sys_id           => "VXWORKS",
        lflags           => "-r",
    },
    "vxworks-ppc750-debug" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "ccppc",
        cflags           => "-ansi -nostdinc -DPPC750 -D_REENTRANT -fvolatile -fno-builtin -fno-for-scope -fsigned-char -Wall -msoft-float -mlongcall -DCPU=PPC604 -I\$(WIND_BASE)/target/h -DPEDANTIC -DDEBUG -g",
        sys_id           => "VXWORKS",
        lflags           => "-r",
    },
    "vxworks-ppc860" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "ccppc",
        cflags           => "-nostdinc -msoft-float -DCPU=PPC860 -DNO_STRINGS_H -I\$(WIND_BASE)/target/h",
        sys_id           => "VXWORKS",
        lflags           => "-r",
    },
    "vxworks-simlinux" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "ccpentium",
        cflags           => "-B\$(WIND_BASE)/host/\$(WIND_HOST_TYPE)/lib/gcc-lib/ -D_VSB_CONFIG_FILE=\"\$(WIND_BASE)/target/lib/h/config/vsbConfig.h\" -DL_ENDIAN -DCPU=SIMLINUX -DTOOL_FAMILY=gnu -DTOOL=gnu -fno-builtin -fno-defer-pop -DNO_STRINGS_H -I\$(WIND_BASE)/target/h -I\$(WIND_BASE)/target/h/wrn/coreip -DOPENSSL_NO_HW_PADLOCK",
        sys_id           => "VXWORKS",
        lflags           => "-r",
        ranlib           => "ranlibpentium",
    },
    "vxworks-mips" => {
        inherit_from     => [ "BASE_unix", asm("mips32_asm") ],
        cc               => "ccmips",
        cflags           => combine("-mrtp -mips2 -O -G 0 -B\$(WIND_BASE)/host/\$(WIND_HOST_TYPE)/lib/gcc-lib/ -D_VSB_CONFIG_FILE=\"\$(WIND_BASE)/target/lib/h/config/vsbConfig.h\" -DCPU=MIPS32 -msoft-float -mno-branch-likely -DTOOL_FAMILY=gnu -DTOOL=gnu -fno-builtin -fno-defer-pop -DNO_STRINGS_H -I\$(WIND_BASE)/target/usr/h -I\$(WIND_BASE)/target/h/wrn/coreip",
                                    threads("-D_REENTRANT")),
        sys_id           => "VXWORKS",
        ex_libs          => add("-Wl,--defsym,__wrs_rtp_base=0xe0000000 -L \$(WIND_BASE)/target/usr/lib/mips/MIPSI32/sfcommon"),
        thread_scheme    => "pthreads",
        perlasm_scheme   => "o32",
        ranlib           => "ranlibmips",
    },

#### uClinux
    "uClinux-dist" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "$ENV{'CC'}",
        cflags           => combine(threads("-D_REENTRANT")),
        ex_libs          => add("\$(LDLIBS)"),
        bn_ops           => "BN_LLONG",
        thread_scheme    => "pthreads",
        dso_scheme       => "$ENV{'LIBSSL_dlfcn'}",
        shared_target    => "linux-shared",
        shared_cflag     => "-fPIC",
        shared_ldflag    => "-shared",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
        ranlib           => "$ENV{'RANLIB'}",
    },
    "uClinux-dist64" => {
        inherit_from     => [ "BASE_unix" ],
        cc               => "$ENV{'CC'}",
        cflags           => combine(threads("-D_REENTRANT")),
        ex_libs          => add("\$(LDLIBS)"),
        bn_ops           => "SIXTY_FOUR_BIT_LONG",
        thread_scheme    => "pthreads",
        dso_scheme       => "$ENV{'LIBSSL_dlfcn'}",
        shared_target    => "linux-shared",
        shared_cflag     => "-fPIC",
        shared_ldflag    => "-shared",
        shared_extension => ".so.\$(SHLIB_MAJOR).\$(SHLIB_MINOR)",
        ranlib           => "$ENV{'RANLIB'}",
    },

    ##### VMS
    "vms-generic" => {
        inherit_from     => [ "BASE_VMS" ],
        template         => 1,
        cc               => "CC/DECC",
        cflags           => picker(default => "/STANDARD=(ISOC94,RELAXED)/NOLIST/PREFIX=ALL",
                                   debug   => "/NOOPTIMIZE/DEBUG",
                                   release => "/OPTIMIZE/NODEBUG"),
        defines          => add("OPENSSL_USE_NODELETE"),
        lflags           => picker(default => "/MAP",
                                   debug   => "/DEBUG/TRACEBACK",
                                   release => "/NODEBUG/NOTRACEBACK"),
        lib_cflags       => add("/NAMES=(AS_IS,SHORTENED)/EXTERN_MODEL=STRICT_REFDEF"),
        dso_cflags       => add("/NAMES=(AS_IS,SHORTENED)"),
        shared_target    => "vms-shared",
        dso_scheme       => "vms",
        thread_scheme    => "pthreads",

        apps_aux_src     => "vms_decc_init.c vms_term_sock.c",
    },

    "vms-alpha" => {
        inherit_from     => [ "vms-generic" ],
        cflags           => add(sub { my @warnings =
                                          @{vms_info(0)->{disable_warns}};
                                      @warnings
                                          ? "/WARNINGS=DISABLE=(".join(",",@warnings).")" : (); }),
        defines          =>
                    add(sub {
                            return vms_info(0)->{def_zlib}
                                ? "LIBZ=\"\"\"".vms_info(0)->{def_zlib}."\"\"\"" : ();
                            }),
        ex_libs          => add(sub { return vms_info(0)->{zlib} || (); }),
        pointer_size     => sub { return vms_info(0)->{pointer_size} },
        #as               => "???",
        #debug_aflags     => "/NOOPTIMIZE/DEBUG",
        #release_aflags   => "/OPTIMIZE/NODEBUG",
        bn_opts          => "SIXTY_FOUR_BIT RC4_INT",
    },
    "vms-alpha-p32" => {
        inherit_from     => [ "vms-generic" ],
        cflags           =>
            add("/POINTER_SIZE=32",
                sub { my @warnings =
                          @{vms_info(32)->{disable_warns}};
                      @warnings
                          ? "/WARNINGS=DISABLE=(".join(",",@warnings).")" : ();
                } ),
        defines          =>
                    add(sub {
                            return vms_info(32)->{def_zlib}
                                ? "LIBZ=\"\"\"".vms_info(32)->{def_zlib}."\"\"\"" : ();
                            }),
        ex_libs          => add(sub { return vms_info(32)->{zlib} || (); }),
        pointer_size     => sub { return vms_info(32)->{pointer_size} },
    },
    "vms-alpha-p64" => {
        inherit_from     => [ "vms-generic" ],
        cflags           =>
            add("/POINTER_SIZE=64=ARGV",
                sub { my @warnings =
                          @{vms_info(64)->{disable_warns}};
                      @warnings
                          ? "/WARNINGS=DISABLE=(".join(",",@warnings).")" : ();
                } ),
        defines          =>
                    add(sub {
                            return vms_info(64)->{def_zlib}
                                ? "LIBZ=\"\"\"".vms_info(64)->{def_zlib}."\"\"\"" : ();
                            }),
        ex_libs          => add(sub { return vms_info(64)->{zlib} || (); }),
        pointer_size     => sub { return vms_info(64)->{pointer_size} },
    },
    "vms-ia64" => {
        inherit_from     => [ "vms-generic" ],
        cflags           => add(sub { my @warnings =
                                          @{vms_info(0)->{disable_warns}};
                                      @warnings
                                          ? "/WARNINGS=DISABLE=(".join(",",@warnings).")" : (); }),
        defines          =>
                    add(sub {
                            return vms_info(0)->{def_zlib}
                                ? "LIBZ=\"\"\"".vms_info(0)->{def_zlib}."\"\"\"" : ();
                            }),
        ex_libs          => add(sub { return vms_info(0)->{zlib} || (); }),
        pointer_size     => sub { return vms_info(0)->{pointer_size} },
        #as               => "I4S",
        #debug_aflags     => "/NOOPTIMIZE/DEBUG",
        #release_aflags   => "/OPTIMIZE/NODEBUG",
        bn_opts          => "SIXTY_FOUR_BIT RC4_INT",
    },
    "vms-ia64-p32" => {
        inherit_from     => [ "vms-generic" ],
        cflags           =>
            add("/POINTER_SIZE=32",
                sub { my @warnings =
                          @{vms_info(32)->{disable_warns}};
                      @warnings
                          ? "/WARNINGS=DISABLE=(".join(",",@warnings).")" : ();
                } ),
        defines          =>
                    add(sub {
                            return vms_info(32)->{def_zlib}
                                ? "LIBZ=\"\"\"".vms_info(32)->{def_zlib}."\"\"\"" : ();
                            }),
        ex_libs          => add(sub { return vms_info(32)->{zlib} || (); }),
        pointer_size     => sub { return vms_info(32)->{pointer_size} },
    },
    "vms-ia64-p64" => {
        inherit_from     => [ "vms-generic" ],
        cflags           =>
            add("/POINTER_SIZE=64=ARGV",
                sub { my @warnings =
                          @{vms_info(64)->{disable_warns}};
                      @warnings
                          ? "/WARNINGS=DISABLE=(".join(",",@warnings).")" : ();
                } ),
        defines          =>
                    add(sub {
                            return vms_info(64)->{def_zlib}
                                ? "LIBZ=\"\"\"".vms_info(64)->{def_zlib}."\"\"\"" : ();
                            }),
        ex_libs          => add(sub { return vms_info(64)->{zlib} || (); }),
        pointer_size     => sub { return vms_info(64)->{pointer_size} },
    },

);
